#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>

struct S
{
	int _a : 3;
	int _b : 4;
	int _c : 5;
	int _d : 4;
};

int main()
{
	struct S s = { 0 };
	s._a = 10;
	s._b = 12;
	s._c = 3;
	s._d = 4;

	printf("%d\n", sizeof(struct S));

	return 0;
}